engine

Hello all. Hope someone else has an idea on this one. we have noticed that, about 2-5 minutes after turning the engine off, there’s a strange “groaning” noise coming from the engine / front.Vehicle is stopped. first time we heard it, we thought it was construction. Nope. Then we thought it...

Picked up a 2010 Armada about a month ago with 137k. There is a slight rattling noise that I have traced to the crankshaft pulley/harmonic balancer. When I take the belt off and start it without the belt there is no noise at all. It also looks like there is a slight (tiny) wobble in of the...